A roller has diameter 91cm and it is 130cm long.it takes 600 revolutio – InterviewSolution

1.	A roller has diameter 91cm and it is 130cm long.it takes 600 revolutions to level a playground .find cost of revelling at rate 37 paise pr square meter
Answer» so it's LATERAL SURFACE AREA so 2 PIE r h ok222/745.5*130=37180

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